Abstract: Introduced the industrial experiment and the production application of rotary ebullition drying furnace in Sci-tech Chemicals Co.of Shanxi Aluminium Plant for pseudoboehmite drying process,during which the rotary ebullition drying furnace with gas burning as heat source was used to replace forced ebullition drying furnace with electricitiy and steam as heat source.Through detailed analysis of investment,energy consumption,capacity,cost,and efficiency,conclusions have been drown that heat air by burning gas can replace heat air by steam and electricity-heating to dry pseudoboehmite,which can save investment,reduce energy consumption,increase capacity,decrease cost,and open a new effective path for pseudoboehmite drying,which is suitable to dry gel hydrate filtering cake and slurry,and has very high spreading value for drying gel materials in metallurgical,chemical,and environment protection industries.<BR>